Early Pennsylvanian paleotopography and depositional environments, Rock Island County, Illinois earlypennsylvani18lear Year: 1985 Channel removed by quarrying 777/ Last remaining undistrubed shale, 1984 Figure 7. Channel filled with fossil-bearing shale, siltstone, and sandstone in the Allied Stone Company quarry. T o CM T M'','',','', Figure 8. Cross section of a channel.

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